诺多项式4x^2-6xy+2x-3y与ax^2+bxy+3ax-2by的和不含二次项,求a和b的值
问题描述：
诺多项式4x^2-6xy+2x-3y与ax^2+bxy+3ax-2by的和不含二次项,求a和b的值
答
4x^2-6xy+2x-3y+ax^2+bxy+3ax-2by
=(4+a)x²+(b-6)xy+2x-3y+3ax-2by
所以4+a=0,b-6=0
即a=-4,b=6